CIDR Practice Question_

Duration: 5 min

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Inside: a video lesson and guided study material.

Module outline

  1. HPSC Interview Preparation: Interview Preparation
  2. Python Language: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis, DSA using Python
  3. Data Structure & Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Sorting Algorithms, Minimum Spanning Trees, Time Complexity Analysis, Graph Theory, Shortest Path Algos
  4. Computer Networks: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Security
  5. Computer System & Organisation: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Programming the Basic Computer
  6. Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, SQL, File Organization & Indexing, Transaction Management, Concurrency Control
  7. Operating Systems: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling
  8. Digital Logic & Circuits: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation
  9. Theory Of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Pushdown Automata & CFG, Turing Machines, Moore & Mealy Machines
  10. Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  11. Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management, Data Warehousing & Mining
  12. Introduction to Emerging Trends: Emerging Tech Trends, समुच्चय, संबंध, फलन और विविक्त गणित / Sets, Relations, Functions and Discrete Mathematics, व्यापार, विपणन एवं उपभोक्ता संरक्षण / Trade, Marketing and Consumer Protection, कंप्यूटर नेटवर्क / Computer Networks
  13. Digital Society & Cyber Law: Society, Law & Ethics, साइबर सुरक्षा / Cyber Safety and Security
  14. HPSC PGT Previous Year Paper:
  15. HPSC Assistant Professor Previous Year Paper:
  16. Live Sessions: HPSC Live Sessions, EMRS TGT/PGT Live Class
  17. Full Mock Test:
  18. HPSC PGT - MOCK Test Series:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video is a tutorial on subnetting using Classless Inter-Domain Routing (CIDR). The instructor starts with a specific problem: dividing the network 40.30.20.10/25 into two subnets. He demonstrates the process by converting the IP address to binary, identifying the network and host portions, and borrowing bits to create the subnets. The lecture concludes with a detailed breakdown of the resulting subnets, including their network addresses, ranges, and CIDR notation. The visual aids, including binary conversions and range calculations, help clarify the abstract concepts of subnetting.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor introduces the problem statement: 'Consider the network having IP Address 40.30.20.10/25 Divide this network into two subnets.' He draws a circle to visualize the network and writes the IP address 40.30.20.10 /25 on the board. He begins converting the IP address octets into binary, writing 00101000 for 40, 00011110 for 30, and 00010100 for 20. He explains that the /25 indicates the first 25 bits are the network ID. He underlines the network portion and the host portion to clarify the boundary.

  2. 2:00 – 5:00 02:00-05:00

    The instructor focuses on the fourth octet, converting 10 to binary 00001010. He explains that to divide the network into two subnets, one bit must be borrowed from the host portion, changing the prefix from /25 to /26. He writes 00 and 10 (representing the subnet bits) to illustrate the split. He calculates the new network addresses: 40.30.20.0/26 and 40.30.20.128/26. He details the total number of IP addresses (2^6 = 64) and the usable hosts (64 - 2 = 62). He lists the range of IP addresses for each subnet, specifically mentioning the first and last addresses. He writes down the CIDR representation for both resulting subnets.

  3. 5:00 – 5:11 05:00-05:11

    The final slide displays the complete solution. It shows two columns labeled '1st Subnet' and '2nd Subnet'. The 1st Subnet is 40.30.20.0/26 with a range of 40.30.20.0 to 40.30.20.63. The 2nd Subnet is 40.30.20.128/26 with a range of 40.30.20.128 to 40.30.20.191. The slide also lists the total number of IP addresses, first/last addresses, and CIDR representation for both subnets. It visually connects the binary values to the decimal ranges.

The lesson effectively demonstrates the practical application of CIDR subnetting. By starting with a specific IP and prefix, the instructor guides the viewer through the binary conversion and bit-borrowing process required to create subnets. The final summary slide reinforces the key calculations, such as determining the number of hosts and the specific IP ranges, providing a clear reference for solving similar subnetting problems. The step-by-step approach ensures that students can follow the logic from the initial problem statement to the final calculated subnets.

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